diff --git a/academic.xml b/academic.xml
index ad0230c..4e9af2c 100755
--- a/academic.xml
+++ b/academic.xml
@@ -749,7 +749,7 @@ gen_tcp:send(Socket, ["GET ", Url, " HTTP/1.0", "\r\\n\r\\n"]).
 
 	There is an active research group looking at problems
 	related to formal verification, they have a 
-	<url href="http://www.sics.se/research/fdt.php">home page</url>.
+	<url href="http://www.sics.se/fdt/">home page</url>.
 	
 </p></section>
 <section><title>I've heard it's a bad idea to program defensively in Erlang. Why?</title>
diff --git a/how_do_i.xml b/how_do_i.xml
index db7539c..09e65b2 100755
--- a/how_do_i.xml
+++ b/how_do_i.xml
@@ -243,7 +243,7 @@
 	There are a number of user-supported methods and tools, including
 </p>
     <list>
-      <item><p><url href="http://epi.sourceforge.net/">A set of C++ classes</url></p></item>
+      <item><p><url href="http://code.google.com/p/epi/">A set of C++ classes</url></p></item>
       <item><p><url href="http://www.lysator.liu.se/~tab/erlang/py_interface/">A Python implementation of an Erlang hidden node</url></p></item>
       <item><p><url href="http://www.snookles.com/erlang/edtk/">
 	EDTK, a port-driver toolkit,</url> roughly equivalent
diff --git a/introduction.xml b/introduction.xml
index 32f407d..fb9abb1 100755
--- a/introduction.xml
+++ b/introduction.xml
@@ -263,7 +263,7 @@
         </p></item>
 
 	<item><p>
-		<url href="http://vodka.lfcia.org">University of 
+		<url href="http://http://www.udc.es/">University of 
 		A Coru&ntilde;a</url>	in Spain.
         </p></item>
 
diff --git a/obtaining.xml b/obtaining.xml
index 413b11e..a72cda1 100755
--- a/obtaining.xml
+++ b/obtaining.xml
@@ -188,6 +188,7 @@
 </p><p>
 	
 	Mnesia's internals are described on 
+	<!-- REVISIT: erlang projects was down at last viewing, 2009-05-15 -->
 	<url href="http://www.erlang-projects.org/Groups/erlang_frameworks/mnesia_internals_sli/block_11394822732946/file">
 	H&aring;kan's slides</url>
 
@@ -203,6 +204,7 @@
 	</c>. 
 
 </p><p>
+	<!-- REVISIT: erlang projects was down at last viewing, 2009-05-15 -->
 	Erlang-projects has a <url href="http://www.erlang-projects.org/Public/documentation/serc/">collection</url> of papers written at the
 	now-defunct SERC division of RMIT.
 
@@ -307,7 +309,7 @@ distributing it are:
 
       <item><p>Putting the code on a personal homepage </p></item>
 
-      <item><p>Getting your code <url href="http://cean.process-one.net/contrib/CEAN">packaged into the CEAN</url></p></item>
+      <item><p>Getting your code <url href="http://cean.process-one.net/contrib/packaging-guide.txt">packaged into the CEAN</url></p></item>
     </list>
   </section>
   <section>
@@ -316,7 +318,7 @@ distributing it are:
     <p>
         Even though Erlang is a fairly mature language with a large
         established code-base, changes and enhancements are still
-        being incorporated. There is a newly established mechanism
+        being incorporated. There is a mechanism
         called the <url
         href="http://user.it.uu.se/~pergu/eep/eep-0001.html">Erlang
         Enhancement Proposal</url> which formalises the process.
@@ -410,7 +412,7 @@ distributing it are:
     <p>
 
 	The erlang-questions list is
-	<url href="http://www.erlang.org/ml-archive/erlang-questions/">
+	<url href="http://www.erlang.org/pipermail/erlang-questions/">
 	archived on the Erlang website</url>. 
 
         </p><p>
@@ -438,6 +440,7 @@ distributing it are:
   <section><title>Are there any websites apart from erlang.org?</title>
 
     <p>
+	<!-- REVISIT: erlang projects was down at last viewing, 2009-05-15 -->
 	<url href="http://www.erlang-projects.org/">Erlang-projects</url>
 	aims to track Erlang use in projects.
 
diff --git a/tools.xml b/tools.xml
index 2ee00f0..3c71fb7 100755
--- a/tools.xml
+++ b/tools.xml
@@ -67,8 +67,7 @@ href="http://www.erlang.org/ml-archive/erlang-questions/199903/msg00002.html">
 <p>
 	A test suite is especially useful for making sure that
 	"improvements" to the system haven't broken something.
-	The OTP group have released their comprehensive 
-	<url href="http://www.erlang.org/project/test_server/index.html">test system</url> for Erlang. The test server can be used for testing
+	The <url href="http://www.erlang.org/project/test_server/index.html">test system</url> for Erlang. The test server can be used for testing
 	your project and it includes test suites for the Erlang emulator
 	and erlang stdlib.
 	</p><p>